Frank g



(No Model.) I

F. G. JOHNSON. SEWER GAS .VALVE.

Patented July 14 m T m V N I N. PETERS, Fholo-Lithagmphnr, Walhinginn, n. c,

the basin.

NlTED STATES PATENT FRANK JOHNSON, on NEW YORK, N. v.

SEWER-GAS VALVE.

SFECIFICATIQN forming part of Letters Patent No. 321,973, dated July 14, 1885.

Application filed April 8, 1884. (No model.)

To all whom it may concern:

Be it known that I, FRANK G. JoHNsoN, a citizen of the United States, residing in the city, county, and State of New York, have invented a new and useful SewerGas Valve, of which the following is a specification.

In the use of public water it is found necessary to provide wash-basins, near the top of the same, with a series of escape-openings connected with the sewer or waste pipe, to allow the water to flow out for the purpose of preventing an overflow of water at the top of the basin in the event of its being allowed, accidentally or otherwise, to continuously run from the supply-faucet. These escape-openings, as they communicate directly with the sewer or cesspool pipe, permit the sewer-gas to flow through them into the apartments of dwellings and other rooms where the basins are located.

The object of my invention is to provide a gas-valve for these escape-openings, which can be readily applied and removed.

The following is a full, clear, and exact description of my invention, reference being had to the accompanying drawings, in which Figure 1 is a vertical transverse section, and Fig. 2 a horizontal transverse section showing a top view.

' Similarletters refer to similar parts in both illustrations.

A is an ordinary stationary wash-basin; A, the slab to which the basin is fastened. a a are the escape-openings, near the top of the basin, through which the overflow water passes, to prevent the basin from being overflowed at the top. a is the passage-way on the outside of the basin, connecting with the sewer or waste pipe a.

B B is a disk-valve, concave on one side and convex on the other, made of rubber or such flexible material as to allow its edges to conform to the interior surface of the basin A when it is pressed against it, and made sufficiently large to span all the escape-openings a a. On the convex or outer side of this valve proper, B B, at its central point, is secured a tube, 0, of suitable size and strength, extending back toward the opposite side of \Vithin this tube 0 is placed a spiral spring, (I, and a rod, D. This rod comes in contact with the spring (I, and ex tends to somewhat beyond the opposite side of the basin. The object of the spring (2 and rod D is twofoldfirst, to adjust the device to basins of different diameters, and, second, to produce a steady and gentle pressure of the valve proper, B B, against the side of the basin, and to hold it in place over the escapeopenings at a.

The tube 0 and rod D, by means of the spring d, thus constitute a contractile and distensible shank to the valve proper, B B, which serve as a handle, as well as the means of holding the valve in place and rendering the entire device adjustable to basins of various sizes.

Having described the several parts of the device, I will now explain its operation.

\Vhen the device is not applied to the basin, the rod D is crowded so far out of the tube 0 by the spring D as to cause the length of the device to be distended to somewhat greater length than the diameter of any ordinary wash-basin.

To place the device in position and cover the escape-openings, and so cut off the flow of the sewer-gas into the apartment where the basin is located, it is only necessary to grasp the device by the rod D and place the valve proper, B B, over the openings at a, and then push the rod D against the spring cl far enough into the tube 0 to pass the outer end of the rod down past the rim A of the basin, and remove the hand, whereupon the spring (I will push the disk-valve proper, B B, against the side of the basin by means of counter action on the opposite side of the basin.

To remove the device, it is only necessary to grasp the rod D and crowd it against the spring (I, so as to pass its outer end up past the rim A of the basin.

1 do not limit myself to placing the valve proper, B B, on the end of the tube 0, as it can be as well, and, perhaps, preferably, placed on the outer end of the rod D.

I am aware of the patent granted to Christopher Y. emple, No. 216,006, in which he employs pads instead of a hollow cap for covering the waste-holes of the wash-basins, and

ICO

' two sliding tubes, placed upon a rod and actuated by a spiral spring, with stop-pins upon the rod working in slots made in the tubes, in such a manner that the spring is exposed to view. Therefore I do not claim, broadly, a

contracting and disteusible shank carrying upon one or both ends a pad; but

Vhat I do claim, and desire to secure by Letters Patent, is

A sewer-gas stopper, in combination with wash-basins, consisting of one flexible cap, B B, one tube, 0, one straight rod, D, one spiral spring, (2, contained within the tube 0 and surrounding the rod D, all arranged and 00111- bined together in the manner and for the pur- 1 pose substantially as set forth.

FRANK G. JOHNSON. Vitnesses:

JNo. J. MALMAR, N. O. HALSTED. 

